20867-15-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20867-15-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,6 and 7 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 20867-15:
(7*2)+(6*0)+(5*8)+(4*6)+(3*7)+(2*1)+(1*5)=106
106 % 10 = 6
So 20867-15-6 is a valid CAS Registry Number.
20867-15-6Relevant articles and documents
Further syntheses of cyproterone acetate
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Page/Page column 16; 27-28; 29-30; 31-32, (2010/02/07)
The present invention relates to improved methods for synthesising cyproterone acetate (17α-Acetoxy-6-chloro-1α, 2α-methylene-4,6-pregnadiene-3,20-dione) from solasodine. The methods of the invention are shorter as those of the prior art and therefore more economic.